Given ABCD - WXYZ, Find the length of the segment AD, If Ab=12 WX=20 and WZ=8 PLEASE HELP IM GONNA FAIL WILL GIVE BRAINLESS

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.

The probability that a tutor will see 0, 1, 2, 3, or 4 students is given below determine the probability distribution's missing value.